A businessman is offering a £1,000 reward to catch whoever wrecked the windows of his excavator.
Mark Geldard, who is running an infill operation at Braithwaite Quarry, off Blackhill Lane, Keighley, was furious when he arrived at work to find his machine had been smashed up.
Mr Geldard, 44, said it was the second time machinery at the site has been attacked in less than one month.
"We've got no electricity up here so we don't have any security cameras, it's just on trust.
"I don't think anyone local would have done this. Everyone's nice round here and wouldn't touch a thing. I think it's a vendetta."
Mr Geldard said all the windows on his 360 degree excavator, valued at about £15,000, had been smashed - costing him about £1,000.
He said he had to spend £400 to get new windows for another machine after it was vandalised over the August Bank Holiday weekend.
"It hasn't stopped us from working, but it could do if the attacks go on or get worse.
"We're just finishing off this job at the quarry and people pay us to come and tip but it's all rubble from works, there's no household waste."
A police spokesman confirmed they had taken a report of a vehicle being damaged at the quarry overnight on Wednesday and were going to send officers out to talk to Mr Geldard.
"I'll willingly give £1,000 to anyone who gives police information that leads to the conviction of whoever did this to me," Mr Geldard said.
Anyone with information should contact Keighley Police Station.
e-mail: kathie.griffiths @bradford.newsquest.co.uk
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